Johnson had a small but memorable role in “The Social Network” before appearing in last year’s “21 Jump Street.” She’s currently shooting a modern-day re-telling of Shakespeare’s “Cymbeline.”

The storyline of “Fifty Shades” will require the former IMG model to participate in plenty of heated sex scenes, though it’s unclear how explicit the film will be. It seems unlikely that the numerous playful S&M scenes depicted in the book could be depicted with an “R” rating, so it could end up as one of the highest-profile NC-17 pics yet.